On May 30, 1806, future President Andrew Jackson killed Charles Dickinson in a duel after Dickinson accused Jackson's wife of bigamy. From the article:
"Jackson and Dickinson were rival horse breeders and southern plantation owners with a long-standing hatred of each other. Dickinson accused Jackson of reneging on a horse bet, calling Jackson a coward and an equivocator. Dickinson also called Rachel Jackson a bigamist. (Rachel had married Jackson not knowing her first husband had failed to finalize their divorce.) After the insult to Rachel and a statement published in the National Review in which Dickinson called Jackson a worthless scoundrel and, again, a coward, Jackson challenged Dickinson to a duel.
On May 30, 1806, Jackson and Dickinson met at Harrison's Mills on the Red River in Logan, Kentucky. At the first signal from their seconds, Dickinson fired. Jackson received Dickinson’s first bullet in the chest next to his heart. Jackson put his hand over the wound to staunch the flow of blood and stayed standing long enough to fire his gun. Dickinson’s seconds claimed Jackson’s first shot misfired, which would have meant the duel was over, but, in a breach of etiquette, Jackson re-cocked the gun and shot again, this time killing his opponent. Although Jackson recovered, he suffered chronic pain from the wound for the remainder of his life."